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calculate the volume of 0.050 acetic acid needed to prepare 4.0 L of aceic acid solution with a PH of 3.80


  • chemistry - ,

    Is that 0.050 M acetic acid? Let HAc stand for CH3COOH.
    You want pH = 3.80, convert that to (H^+) by pH = -log(H^+).
    Ka = (H^+)(Ac^-)/(HAc)
    Substitute (H^+),(Ac^-), and Ka into the Ka expression and solve for (HAc). Then
    substitute into the dilution equation to finish.
    m1C1 = m2C2

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